AdvertisementGenetically Modified Viruses Help Save A Patient With A 'Superbug' Infection03:49Download AudioResumeMay 08, 2019Rob SteinfacebookEmailIsabelle Carnell-Holdaway (left), now 17, with her mother Joanne Carnell-Holdaway. Isabelle has a dangerous infection that is being treated with a cocktail of genetically modified viruses. (Courtesy of Jo Holdaway)